Rep eplacement lacement & R & Reh ehabilita abilitation - - PowerPoint PPT Presentation

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rep eplacement lacement r reh ehabilita abilitation tion

Nov 25, 2023 253 likes •359 views

Rep eplacement lacement & R & Reh ehabilita abilitation tion Progr gramme amme (R&R) R) of Wat ater er Ma Mains ins in in Ho Hong ng Kong ng 1 Water Supplies Department To provide reliable and adequate supplies

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Rep eplacement lacement & R & Reh ehabilita abilitation tion Progr gramme amme (R&R) R) of Wat ater er Ma Mains ins in in Ho Hong ng Kong ng

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To provide reliable and adequate supplies of quality water to a population of over 7.3 million. 17 impounding reservoirs 21 water treatment plants 5MCM fresh water production 2MCM sea water for flushing

Water Supplies Department

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 About 7,800 km of water mains (fresh water and salt water).  A substantial portion of them was laid more than 30 years ago.  Progressively approaching the end of their service life.  Increasing number of main burst and leakage cases causing inconvenience to the public and loss of precious water.

Problem Identification

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 To improve the condition of the water supply network so as to maintain a reasonable level of services to consumers.  To replace or rehabilitate about 3,000 km

f aged water mains in 15 years

Project Goal

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Project Implementation - Key Issues

To avoid unnecessary water supply disruption to consumers as a result of excessive amount of works, To avoid unnecessary traffic disruption during construction as a result of excessive road opening works, and Having cost effectiveness of the works with priority given to water mains more susceptible to leakage and bursting. To tackle the problems arising from the ageing of water mains in a cost effective manner whilst minimizing the effects on the general public, the aged water mains are required to replace and rehabilitate in Stages in a systematic manner.

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Project Implementation - Key Issues

Traffic/Restricted working hours
Environmental concerns esp. in

urban areas

Unforeseen site conditions /

complicated interfaces with other utilities

Maintain water supply to suit

different consumers and business undertakings

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Project Implementation - Key Strategies

Open Cut Method

1) Replacement method

Pipe Jacking Directional drilling

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Project Implementation - Key Strategies

Fully Structural Compact Pipe Non-Structural Linining by Glass Fiber Coating Works

2. Rehabilitation Method

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Benefits of the Project

What's next... Water Intelligent Network (WIN)

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